It's powered by a rechargeable battery pack that sits in the
jacket's left inside pocket. The brand says the battery pack will
last for up to eight hours of use and can also be used as a
portable smartphone charger.

Both the men's and women's jackets are getting
mostly positive reviews on Amazon, with people calling them a
"must have" for the winter. Others wrote that the heating
elements work "super quickly" and that the battery works "like a
champ."

Some, however, said the jacket runs small, and others said they
found the size of the battery "bulky."